I have a use case for parsing QIF files via an API. As result, there is no longer a file for parse to take as input. While I could save it as a temporary file and send that in, it seems an unnecessary step when the first few lines of parse could be split into a new function i.e. parse_file and then parse could simply take a string of the file contents.

I appreciate this would cause breaking changes, so perhaps a less breaking change would be to rename parse to parse_str or similar, and then remake the parse function with the beginning lines to read the file and pass it on to parse_str.

I'm willing to make a PR of the changes with the appropriate test modifications and additions once #105 is merged. Also, a discussion about any other possible parse versions could be had (bytes, stream, etc.)